Rollup merge of #87993 - kornelski:try_reserve_stable, r=joshtriplett

Stabilize try_reserve

Stabilization PR for the [`try_reserve` feature](https://github.com/rust-lang/rust/issues/48043#issuecomment-898040475).

5 files changed, 4 insertions, 7 deletions

diff --git a/library/std/src/collections/hash/map.rs b/library/std/src/collections/hash/map.rs
index 2de16ce3f86..528bb1bf6e9 100644
--- a/library/std/src/collections/hash/map.rs
+++ b/library/std/src/collections/hash/map.rs
@@ -625,14 +625,13 @@ where
     /// # Examples
     ///
     /// ```
-    /// #![feature(try_reserve)]
     /// use std::collections::HashMap;
     ///
     /// let mut map: HashMap<&str, isize> = HashMap::new();
     /// map.try_reserve(10).expect("why is the test harness OOMing on 10 bytes?");
     /// ```
     #[inline]
-    #[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+    #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> {
         self.base.try_reserve(additional).map_err(map_try_reserve_error)
     }
diff --git a/library/std/src/collections/hash/set.rs b/library/std/src/collections/hash/set.rs
index 2613fbce156..dcfe3220950 100644
--- a/library/std/src/collections/hash/set.rs
+++ b/library/std/src/collections/hash/set.rs
@@ -423,13 +423,12 @@ where
     /// # Examples
     ///
     /// ```
-    /// #![feature(try_reserve)]
     /// use std::collections::HashSet;
     /// let mut set: HashSet<i32> = HashSet::new();
     /// set.try_reserve(10).expect("why is the test harness OOMing on 10 bytes?");
     /// ```
     #[inline]
-    #[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+    #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> {
         self.base.try_reserve(additional).map_err(map_try_reserve_error)
     }
diff --git a/library/std/src/collections/mod.rs b/library/std/src/collections/mod.rs
index 6ca0525cdbe..a19c3431989 100644
--- a/library/std/src/collections/mod.rs
+++ b/library/std/src/collections/mod.rs
@@ -420,7 +420,7 @@ pub use self::hash_map::HashMap;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::hash_set::HashSet;
 
-#[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+#[stable(feature = "try_reserve", since = "1.57.0")]
 pub use alloc_crate::collections::TryReserveError;
 #[unstable(
     feature = "try_reserve_kind",
diff --git a/library/std/src/error.rs b/library/std/src/error.rs
index cc4ea27e57e..6ae0bc47a94 100644
--- a/library/std/src/error.rs
+++ b/library/std/src/error.rs
@@ -595,7 +595,7 @@ impl Error for char::ParseCharError {
     }
 }
 
-#[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+#[stable(feature = "try_reserve", since = "1.57.0")]
 impl Error for alloc::collections::TryReserveError {}
 
 #[unstable(feature = "duration_checked_float", issue = "83400")]
diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index b33a3c5d22f..0ba4e85886c 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -331,7 +331,6 @@
 #![feature(total_cmp)]
 #![feature(trace_macros)]
 #![feature(try_blocks)]
-#![feature(try_reserve)]
 #![feature(try_reserve_kind)]
 #![feature(unboxed_closures)]
 #![feature(unwrap_infallible)]